Malicious PDF — malware analysis report

Static analysis result for SHA-256 748a4a309c7edb82…

MALICIOUS

PDF

33.6 KB Created: 2020-09-05 18:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 747251bd96898fdcd58e308112dbdbc6 SHA-1: b12c13361253597fac1c63b8fd17603976ee4428 SHA-256: 748a4a309c7edb82a2ffe24a06ee69dc029fdc8485446254b81ceb0fca667ffb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for users to click on a link, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/pify?keyword=weekly+weather+report+in+my+location In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/wotewojifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/forge_energy_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5273/5391/files/jupon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/29976613543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0489/8978/files/ejercicios_alcanos_alquenos_y_alquinos_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/kebirali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kebiwubinixakagaxirefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1324/5848/files/convert_plist_to_xml.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/convert_decimal_degrees_to_dms.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1108c_dbff7bb2d43e41dca99e3c2d0d53e72d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0789d5_da48ca4cc02b430d98a8b5e283581ac7.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4701 5268 bytes
SHA-256: 859e16dfc10520d61117d21334ed86f35aeccac18cb28517bce0b679b9e10ce6
font_01_sfnt_off000058e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58E2 9684 bytes
SHA-256: f64f30e76cf2e1b4f3577f6b0c7890eccafb8c5049218d1cd539f1b8f49c3566

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